23505780 has 48 divisors (see below), whose sum is σ = 66064320. Its totient is φ = 6244608.

The previous prime is 23505749. The next prime is 23505787. The reversal of 23505780 is 8750532.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23505787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20256 + ... + 21384.

It is an arithmetic number, because the mean of its divisors is an integer number (1376340).

Almost surely, 2^23505780 is an apocalyptic number.

23505780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23505780 is an abundant number, since it is smaller than the sum of its proper divisors (42558540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23505780 is a wasteful number, since it uses less digits than its factorization.

23505780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 23505780 is about 4848.2759822436. The cubic root of 23505780 is about 286.4561972939.

The spelling of 23505780 in words is "twenty-three million, five hundred five thousand, seven hundred eighty".